If you’re holding on to Alaska Mileage Plan miles, you’ll know that award changes and cancellations are free up till 60 days before departure. Any changes or cancellations within the 60 day period attract a fee of US$125.
However, from 5 June 2018, Alaska will charge the US$125 fee regardless of time to departure. If you’re used to KrisFlyer’s low service fees (even after the new structure came into place), you’ll find this pretty steep, although it’s still lower than other US airlines.
The upshot of this is it’s no longer realistic to book a speculative Mileage Plan award and keep kicking it down the road before the 60 day period.